Pump piston



` www5 July 17, 1923.

T. W. DELANEY PUMP PISTON Filed June '7. 1921 2 Sheets-Sheet 1 l/V VEN TOR TIM. DELANEY. er

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/1 TTUR/VEYS EMEA-45' T. W. DELANEY PUMP PIsToN Filed June v'. 1921 2 sheets-sheep@ July 17, 1923.

Patented .luly 17, 1923.

li ST THOMAS W. DELANEY, OF ST. PAUL, MINNESOTA.

AppIication filed June 7,

To all whom it may concern.'

Be it known that I, THOMAS W. DELANEY, a citizen of the United States, and a resident of St. Paul, in the county of Ramsey and State of Minnesota, have invented a new and Improved Pump Piston, of which the following is a description.

My invention relates to a double-acting deep-well pump and more particularly to a pump in which plungers are provided one above another.

The general object of my invention is to provide a pump of the indicated type improved in various particulars especially with respect to promoting simplicity and providing operative parts characterized by the minimum friction in operation, and discharging the liquid in practically a constant stream.

More specifically, the invention has in view to provide a simple form of a mechanically operated valve in the plungers with a novel arrangement of air chamber directly above the cylinder.

The nature of the invention, its distinctive features and advantages, will clearly appear as the description proceeds.

Reference is to be had to the accompanying drawings forming a part of this specilication, it being understood that the drawings are merely illustrative of one example of the invention.

Figure 1 is a vertical section in a plane indicated by the line 1 1, Figure 3;

Figure 2 is a plan view of my improved pump Figure 3 is a front view being broken frame 1() is provided having bearings for ay crank shaft 11. Upper and lower bellcrank levers 12, 13 are mounted on shafts 14. 15 respectively above and vbelow the crank shaft 11. One arm 12a, 13a of the respective bell crank levers 12. 13 is slotted. the slotted arms lying parallel and in overlapping PUMP PISTON.

1921. Serial No. 475,616. i

planes. On the shaft 11 are two crank arms 16, the wrist pin 17 of each crank being provided with a pair of rollers 18, 18a, the rollers of one crank arm being disposed in the slot of the arm 12a of one lever and the pair of rollers on the other crank arm beingdisposed in the slot of the other lever arm 13L so that during one revolution of the crank shaft 11, therollers 18 will roll, first upwardly over the slotted arms at one side and in the down-stroke will roll over the slotted arms at the opposite side for rocking the levers 12, 13 alternately in opposite directions. i

The other arm of the lever 12 has secured thereto by pins 2O a pair of depending links 19 between the lower ends oi which is secured by a cross pin or bolt 22 a cross head 21 on the upper end of a solid plunger rod 23. The second arm of the lower lever-.13 has secured .thereto by transverse `pins 25 depending links 24, the lower ends of which are securedto the cross head 26 of the hollow plunger 28 through which the solid plunger 23 extends, said cross head 26 being here shownv as secured to the links 24 by side pins 27 projecting from said cross head. The cross head 26 is formed with a stuiiing box into which agland 29 screws, to pack the plunger rod' 23. Solid plunger rod 23 is guided in the bore of a vertical head 30 on an upright bracket or standard 31. the base 32 ot' which. is bolted to flanges or lugs 33 ot T-fitting 34 which is threaded onto the upper end ot' ythe drop pipe the lateral branch 3G of said fitting atl'ordinfr the discharge 'for the water, The hollow plunger rod' 28 extends fluid-tight through the base 32 oi standard 31 and through the fitting 34. the numeral 37 engaging the gland or stniiingbox provided in said tittinff tor said plunger rod. v

The lower end ot the drop pipe 35 is secured to the cap 40 of an air chamber cornpos'ed of inner and outer spaced walls 38` 39 having? a permanent tluid-tight connection with the cap 40. The concentric plunger rods 28 -extend centrally through said air chamber and through a coupling` 41 forming the bottom of said chamber. The coupling has a plurality of spaced members 42 thereon to which the inner tube 38 of the air chamber -is secured. there being spaces 42EL between members 42 and beneath the inner tube 38 for the .flow of water upwardly per end thereof.

through lsaid inner tube 38 and through the drop pipei35 te the .discharge 36 at the up- On the plunger 23 is a valve 43 and on the hollow plunger 28d-s,I a similar valve 44, saidvalve being adapted to engage respectively valve seats 45,45a on pistons 46, 46a in the cylinder 47 secured at its upper end to a depend-ing iian'ge 48 on the coupling 41. Each piston has a oylindricalinner wall 50 and'above said walls'of the' respective pistons,l spiders 4 9, 49a are secured t the' respective plungers 23, 28.' Thus', the' plunger' has a limited movement relative tr'itspiston 46 or 46a,limi'ted`by the isi-,anstrengen the valves 43; 44j and tile spiders 49., 49".` The cylindrical` wall 50`has ai'i oiitviiard1 directed lateral tlange 51. L- Shaped cup leathers`5f2', 53 are disposed about tubular inner walls'of the pistons 46, 46a are engaged; respectively by correspondingly `shaped and lreversely disposed followers 54","55, the upper follower 54 in each piston engaging, external threads'` on the tubular' inner wall of the pistoin The spiders 49' aiu' 49a, are formed wat stipend 44ers? assisi faire@ oder. iiftgwf a@ aides ff '444444 the; .144e cylindrical walls 50 of thel pistons 46 and 46,`-to slop off the pistons main- Iv .mwah uit ein piange 40a 23, vente' 46 Astart on' they upward stroke, valve 43Na`nd 5taking `the load from the upper piston 46 and its valve 44. Said yup'p'er piston, however, also' continue-s on itsnupward stroke at' this time and until the center lii'i'e of the crank passes a point whei'ejtis a't right 'angles to the plane of ii ea from its gaat@ pressure man tie lo'we'i" piston '46a attains a higher speed, the laverie 'tiren' nieves dvvnwardiy anni the has reached the position of Siigiiuym'ore than iso'o 'uien that Shown in naar@ i carrying with it tire h'o'iiow 'pinger rod '28 mia `appr-,iapiston 4e. at

uns 'eine tire iyer 13 and uis heiigw mi 2s and upper pistn 46 stai-t upwardly i'a'diially 'as's'uiiiig a load from the lower piston valve, which latter, however, coinv the Slot in lever 13.1 The upper pinda 46 is tinues the upward movement until the Center line of crank passes at a point where it is at .right angles to the medial line of the slot in lever 13, whereupon thclever 13, the

over one side of the slotted arin' 12a,v

the lco'rrespondiiigroller of the vother' pair will contact with the correspond ing' side ofthe other arm 13a and inthe continued revolution" of the shaft 11 Vwith its cranks 17, the other roller 18a of the two pairs will be in action and Contact with the opposite side of the lever arms 1221 13a.

It willl be observedY from Figure 5'y that i the surfaces 120,13c off the arms 122313a against whichthe rollers 18 or 18a contact at a givenside are adjacent to depressed surfaces 12d,y 13cl of theV respective farms so thatthe roller in Contact with a given surface at one side will be afforded rolling clearance at the diamet'riically opposite'fsidet.

ofthe rollen Thus, given1 roller can' ccntact only with' one side of an'arnr 12u, 1 3".

l would state in conclusion that `while the illustrated example constitutes a practical embodiment of myI inventiomfl doy not limit' myself strictly to th'e mechanical` details hereinillustrated, since' manifestly the saine' can be considerably 'Varied'withvout departure from the spirit of the ini'zentionl as del-ined in the appended claims.'

lvlai'iing thus' described claim 1.' lna p'iiinp', a plunger rod, a disk valve on the plunger rod,` al 'cylinder in `which' the my invention; 1

plunger rodY and the valve operate; a piston i above the valve and a spider yprovided with lingers engaging the inner wall of said piston snugly fitting iny said cylinder, at the upperend of said p'ifsto'n', said piston being Capable of 'movement in the Vcylin'der relaf tively to the plunger rod and limited by the vvalve and/* spi'cler, said spider centeringv said plunger rdd and saidiling'ers centering said piston to' prevent piston" slop'.y

2'; Ina pump of the class idescribed, a

cylinder, a plunger rod extending therein,

a valvey on the rod at thelower'end thereof,

a piston in said cylii'ideij` abover valve.

said piston at its lower [end being provided with a valve-'seat for said valve7` centeringl means on the rod above said piston for centering the plunger rod, and' means fintegral'ivitli said centering means forcenteringV said piston.'

3. 1n a p'ump of the class described, a*

cylinder, a plunger-rod reciprocating Within said Cylinder, a disk valve at the'lower end of Said rod, a spider on said plunger rod in spaced distance from said valve, said spider being provided with depending fingers spaced from the outer edge thereof, a hollow piston having a cylindrical inner wall arranged between the spider and the valve, said lingers engaging said cylindrical wall to center the' same and prevent piston slop, said rod in its movement having a limited movement independently of said piston until the spider or the valve engage said piston wherel7 'toopen or close said Valve on said piston.

THOMAS WILLIAM DELANEY. 

